Phat Trien Cong Nghe Tin Hoc Hai Xuan LTD Address: Zoom 305 B9 KTT Thanh Xuan Bac, Thanh Xuan Bac Ward, Thanh Xuan District, Ha Noi City Enterprise code: 0101418516 Phone: 0248548501 Thanh Xuan Bac Ward, Thanh Xuan District, Ha Noi CityFounding date: 17 - 11 - 2003